Half to f



(No Model.)

e. R; VAN SGHOIGK. WRENGH.

Patented June 28, 1898.

lUNrrn STATES prion.

GEORGE E. VAN SCHOIOK, OF COLDWVATER, MICHIGAN, ASSIGNOR OF ONE- HALF TO F. V. STEWART, OF SAME PLACE.

WRENCH.

SPECIFICATION forming part'of Letters Patent No. 606,317, dated June 28, 1898.

Application filed November 7' Serial No. 660,244. (l lo model.)

To (LZZ whom it may concern..-

Be it known that LGEonGE R. VAN SoHoIoK, acitizen of the United States,residin g at Cold water, in the county of Branch and State of Michigan, have invented a new and useful rench, of which the following is a specification.

The invention relates to improvements in wrenches.

to The object of the present invention is to improve the construction of nut-wrenches, and to provide a simple, strong, and durable one which will be inexpensive in construction and which will be capable of firmly gripping a nut.

The invention consists in the construction and novel combination and arrangement of parts, as hereinafter fully described, illustrated in the accompanying drawings, and

pointed out in the claims hereto appended.

In the drawings, Figure 1 is a perspective view of a wrench constructed in accordance with this invention. Fig. 2 is a longitudinal sectional view of the same. Fig. 3 is a de- 2 5 tail perspective view of the dog.

Like numerals of reference designate corresponding parts in the several figures of the drawings.

1 designates a shank provided with a stao tionary jaw 2, and having a sliding jaw 3 mounted upon it and cooperating with the stationary jaw. The sliding jaw consists of a sheet-metal casing 4 and a metal block 5. The casing consists of parallel sides and a 3 5 connecting back piece, and the block 5 is interposed between the sides of the casing and is spaced from the back portion 6 to provide an opening or way for the shank 1. The sides of the casing and the block 5 are perforated for the reception of rivets 7 or other suitable fastening devices for connecting the parts.

The shank 1 is provided at one side with a series of teeth 8, shouldered toward the stationary jaw 2, and adapted to be engaged by corresponding reversely-shouldered teeth 9 of a dog 10, which is housed within the easing of the sliding jaw and which is connected with an operating-lever 11.

The dog 10 is substantially triangular in side elevation, and is provided atits apex with a perforated ear 12, which is pivoted to a corresponding car 13 ofthe lever 11 by a pin 14 or other suitable pivot. The car 13 of the lever 11 is located adjacent to one end thereof, and this end 15is connected with the sliding jaw by a link 16. Theinner end of the link 16 is pivoted to the adjacent end of the op erating-lever, and the outer end of the link is pivoted tothe sliding jaw by a pin or rivet 17 at a point adjacent to the block 5, the kit ter being recessed, as shown, to receive the link. The recess 18 of the block 5 forms an inner face disposed at an angle to the shank and forming astop for the link when the dog is out of engagement with the shank.

WVhen the dog engages the shank, its pivot 14: forms a fulcrum for the operating-lever 11, and the link and that portion of the lever be tween it and the pivot 14 form a toggle connection, whereby when thehandle portion of the operatinglever is pressed toward the shank 1 the sliding jaw will be forced in the direction of the stationary jaw and will firmly grip a nut or other object to which the wrench is applied; 7

The link is normally forced in the direction of the shank to disengage the dog as soon as the handle of the operatingdever is released by a spring 19, disposed substantially parallel with the adjacent portion of the operating lever 11 when the dog is out of engagement and having one en'd fittingin a notch 20 of the outer edge of the link and its other end se cured to the casing. The outer end of the spring is provided with an enlargement or head 21, extended laterally from the spring and engaging notches 22 of the casing. Be tween its ends the spring bears against a stop 23, consisting of a rivet or other suitable device located adjacent to the head or enlargement.

When the toggle connection is swung outward beyond the center, it forms a lock, and the operator is only required to exert a pressure sufficient to overcome the power of the 5 spring. As soon as the operating-lever is released the spring throws the dog outof en gagement with the shank.

The invention has the following advantages The Wrench is simple and comparatively inexpensive in construction, it possesses strength and durability, and is capable of firmly gripping a nut or other object. The dog, link, and spring are housed within the casing, and the toggle connection operates to force the sliding jaw in the direction of the stationary one and serves as a lock.

Changes in the form, proportion, and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of this invention.

What I claim is- 1. In a wrench, the combination of a shank provided with teeth,a stationary jaw mounted on the shank, a sliding jaw arranged on the latter and provided with an opening or way to receive the same, a dog loosely arranged within the sliding jaw and provided with teeth for engaging the shank, an operating-lever pivoted between its ends to the dog, and a link pivoted to the lever and to the sliding jaw and forming a toggle connection between the dog and the sliding jaw, substantially as and for the purpose described.

2. In a wrench, the combination of a shank provided with teeth,a stationary jaw mounted on the shank, a sliding jaw arranged on the latter and provided with an opening or way to receive the same, a dog loosely arranged within the sliding jaw and provided with teeth for engaging the shank, an operating-lever pivoted between its ends to the dog, a link. pivoted to the lever and to the sliding jaw and forming a toggle connection between the dog and the sliding jaw, and a spring engaging the toggle connection and adapted to break the same to throw the dog out of engagcment with the shank, substantially as described.

3. In a wrench, the combination of a shank provided with a stationary jaw, a sliding jaw mounted on the shank and having a casing provided with notches, a dog arranged within the casing, a lever pivoted between its ends to the dog, a link connecting the lever and the sliding jaw and forming a toggle connec: tion, said link being provided at its outer edge with a notch, a spring engaging the notch of the link and provided with lugs fitting in the notches of the casing, and a stop forming a support for the spring between the ends of the same, substantially as described.

4:. In a wrench, the combination of a shank provided with teeth, a stationary jaw, a sliding jaw composed of a casing and a block arranged between the sides of the casing and provided with a recess forming a face arranged at an angle to the shank and serving 

